Attachment for drilling-machines.



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i Shawn M PATENTED APR. 16, 1907., A. G. BAU'MEISTER.

ATTACHMENT FOR DRILLING MACHINES. APPLICATION FILED unzz, 190s.

ALBERT GEORGE BAUMEISTER, OF SANDUSKY, OHIO.

.ATTAOHMENT FOR DRILLING-MACHINES.

Specification of Letters Patent.

Patented April 16, 1907.

Application filed January 22, 1906. Serial No. 297,311.

To (all 1071/0771 it may concern:

Be it known that I, ALBERT GEORGE BAU- MEISTER, a citizen of the United States, residing at Sandusky, in the county of Erie and State of Ohio, have invented new and useful Improvements in Attachments for Drilling- Machines, of which the following is a specili cation.

This invention is a sensitive or hand-operated drilling attachment adapted to be attached to a drilling-machine, which machine provides the means necessary to support and the power necessary to drive the drilling at tachment. It is designed to take the place of separate sensitive drilling-machines by providing an attachment which can be applied. to or removed from an ordinary drilling-machine at pleasure.

The invention is illustrated and described in connection with a vertical drill-press, but can be applied to and operated in connection with boring and drilling machines of other kinds.

.The invention is illustrated in the accompanying drawings, in Which Figure 1 is a side elevation of a drillingmachine provided with the attachment. Fig. 2 is a top plan view of the attachment re moved from the machine. vation of the attachment removed from the machine.

Referring specifically to the drawings, 6 indicates the column of the drilling-machine, 7 the spindle, and 8 a sleeve over the spindle which is geared to the feeding devices and by which the spindle is raised and lowered. These parts and devices are old in the art and are believed to require no extended description, inasmuch as it is not material to the present invention.

The sensitive drill attachment has a collar 9, which is clamped upon the lower end of the feeding-sleeve by means of a bolt 10. Projecting laterally from this collar is an arm 11, which is jointed to the inner end of an arm 12 by means of a bolt 13, allowing the arm 12 to be swung in a horizontal plane. The arm 12 is forked at the outer end, as at 14, the forks or branches being in line vertically.

The drill-spindle of the attachment is indicated at 15 and is mounted to slide vertically in bearings at the ends of the forks. Between the forks the spindle is provided with a pulley 16, keyed thereon to allow vertical movement of the spindle in the pulley. At

Fig. 3 is a rear elethe upper end the spindle has a yoke 18, connected to a hand-lever 19, which is fulcrumed .at 20 to an arm 21, offset from the arm 12.

the screw in or out the drive of the drill can be adjusted and limited. Fitted upon the lower end of the main spindle 7 is a pulley 22, and this is connected by a belt 23 to the pulley 16.

In use the drill-table is swung so that the sensitive drill is located above the usual bedplate 24, and in this position it can be manipulated by the handle 19 to operate on the work upon the bed-plate. The sensitive drill has an immediate vertical operation from the hand-lever 19, but also has thebenefits of all the feeds, adjustments, and speeds of the main drill. It can be quickly attached or detached and is capable of a wide range of application. The object of the joint 13 in the supporting-arm is to keep the belt 23 in proper tension, and it also simplifies the manufacture of the device from a mechanical point of view. The arm 12 can be swung in or out to take different lengths of belts if other adjustments are wanted or if it becomes desirable to position the sensitive drill at different distances from the main spindle. Also the joint allows the attachment of dif ferent clamps 9 for changing the device to larger or smaller machines. For a shop provided with a drilling-machine the invention will save the cost of a sensitive-drill having all the usual driving and feeding parts, because the attachment can be readily applied to the existing machine.

I claim 1. A drilling attachment comprising a clamp having an arm projecting laterally therefrom, a vertically-movable spindle carried at the outer end of the arm, and. means to drive the spindle.

2. An attachment for a drilling-machine comprising a clamp adapted to be secured to the feeding device of the machine, and having an arm projecting laterally therefrom, a manually-operated drill-spindle carried by said arm, and means to drive the spindle from the main drill-spindle of the machine.-

3. A sensitive-drill attachment for a drilling-machine, comprising a clamp supported on and operated the machine, an arm projecting laterally this screw, and by setting by the feeding devices of from the clamp, a drill-spindle carried by said arm, a lever i'ulcrumed on the arm and connected to the head of the spindle to advance or retract the same, and driving connections between the said spindle and the main spindle of the machine 4. The combination with a drill-press hav ing a feeding-sleeve and. a spindle working within the same, of a clamp secured to the sleeve and having a jointed arm projecting therefrom, a drill-spindle carried at the outer end of the arm, an operating-lever fulcrumed on the armand connected to the head of the spindle, to advance or retract the same, pulleys on the spindles, and a belt connecting the pulleys.

l 1 an arm adapted to be clamped upon the spin 1 dle-bearing of a drilling-machine, a shaft 1ournaled in said arm and adapted to carry a chuck, a pulley-wheel mounted upon said shaft, means to revolve said pulley from the I spindle of the drill, and means to clamp said arm upon the spindle-bearing of the drill.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALBERT GEORGE BAUMEISTER.

5. An attachment for drills consisting of 

